Răspuns :
Salut,
2²⁰⁰² + 4¹⁰⁰¹ = 2²⁰⁰² + (2²)¹⁰⁰¹ = 2²⁰⁰² + 2²⁰⁰² = 2·2²⁰⁰² = 2²⁰⁰³, deci r = 2003.
Green eyes.
2²⁰⁰² + 4¹⁰⁰¹ = 2²⁰⁰² + (2²)¹⁰⁰¹ = 2²⁰⁰² + 2²⁰⁰² = 2·2²⁰⁰² = 2²⁰⁰³, deci r = 2003.
Green eyes.
2^2002 + 4^1001 = 2^r
2^2002 + (2^2)^1001 = 2^r
2^2002 + 2^2002 = 2^r
2 × 2^2002 = 2^r
2^2003 = 2^r
r = 2003
2^2002 + (2^2)^1001 = 2^r
2^2002 + 2^2002 = 2^r
2 × 2^2002 = 2^r
2^2003 = 2^r
r = 2003